Constraints: Properties report

The constraints properties report is available from the popup menu on the data form. It reports the following:

Statics force accuracy, statics moment accuracy

These are only reported if the constraint has free degrees of freedom.

The static analysis searches for an equilibrium position of the constraint out-frame. The resultant force and moment is known as the out-of-balance load. The static analysis cannot always find a configuration where the out-of-balance load is exactly zero because computers have limited numerical precision. OrcaFlex accepts a position as a static equilibrium position if the largest out-of-balance load component is less than the statics accuracy.

The statics force accuracy is $\textit{tol} \times |\vec{f}_\textrm{char}|$ and the statics moment accuracy $\textit{tol} \times |\vec{m}_\textrm{char}|$, where $\textit{tol}$ is the whole system statics tolerance and the characteristic force, $\vec{f}_\textrm{char}$, and characteristic moment, $\vec{m}_\textrm{char}$, are calculated internally based on the forces and moments applied by coupled objects.

The value of $\textit{tol}$ is the whole system statics tolerance. Reducing this tolerance value will give a more accurate static equilibrium position, but will take more iterations. OrcaFlex may not be able to achieve the required tolerance if it is too small, since the computer has limited numerical precision.